[TechAssist] Re: Panasonic CT-36G33W Chassis ALEDP313 in SHUT DOWN
- From: becyn@xxxxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 05 Sep 2005 14:01:39 -0400
Works for me!
Jim McVey
----- Original Message -----
From: tjanphyl@xxxxxxxxxxxxxxx
Date: Monday, September 5, 2005 10:30 am
Subject: [TechAssist] Re: Panasonic CT-36G33W Chassis ALEDP313 in SHUT DOWN
> Fellow techs, correct me if I am wrong, but I have done this with
> many
> makes. The standard 120V lamp is simply a "resistive dummy load"
> for
> the power supply.Like a big 8 ohm resistor connected to an audio
> amp's
> speaker terminal.
> I have seen some power supplies get damaged without this dummy
> load,because some run away without their load.You want to connect
> the
> bulb to the B+ INPUT trace of the fly,otherwise you are pulling DC
> current thru it's windings, and may damage it(flyback).Most main
> regulated B+ outputs from these power supplies going to the fly/HOT
> runs around 90 to 135 VDC. (the PC monitors sometimes go about 80-
> 90VDC), but this is still in the usable range for a standard 120VAC
> incandescant 60watt light bulb. I have a ceramic bulb base(like you
> see in an old house at the ceiling) on a small wooden board and two
> wires with clips on them.One to ground,other to B+. Also the
> brightness and constance of the bulb is a visual indicator.
> Another use: I also use this bulb arrangement in place of the main
> AC
> fuse where the original was blown, and I am troubleshooting the
> PS.Mostly to see if I have cleared a dead short.(Dim= normal AC
> current, bright=short....this rule is for the AC fuse,not the PS
> dummy
> in the flt ckt). Sometimes the simple gadgets are the most useful.
> That amd my Dick Smith ESR meter...another story!
> Phil
>
>
> Phil Bader, Pres.
> Jan Phyl TV Inc
> Winter Haven, Fl
> (863) 299-8821
> estab. 1976
>
> ----- Original Message -----
> From: pete <tvtech@xxxxxxxxxxxxx>
> Date: Sunday, September 4, 2005 9:14 pm
> Subject: [TechAssist] Re: Panasonic CT-36G33W Chassis ALEDP313 in
> SHUT
> DOWN
>
> > Im sorry Phil I guess its been a long day for me I ask the
> > question If you
> > can do that same test on all tvs or does it pertain to only this
> set?>
> > Thank you
> >
> > Pete
> > Perdomo Tv Inc Since 1972
> > Miami.Fl
> > ----- Original Message -----
> > From: <gulftech@xxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Sunday, September 04, 2005 8:04 PM
> > Subject: [TechAssist] Re: Panasonic CT-36G33W Chassis ALEDP313 in
> > SHUT DOWN
> >
> >
> > > Pete,
> > >
> > > The set under discussion is a Panasonic, not a Sony.
> > >
> > >
> > > Ken Smith
> > > Gulf Technical Services
> > > 3034 Gulf Breeze Parkway
> > > Gulf Breeze, FL 32563
> > > 850-934-8324 (Voice) 850-932-0819 (Fax)
> > >
> > > On Sun, 4 Sep 2005 15:41:28 -0500 "pete" <tvtech@xxxxxxxxxxxxx>
> > writes:>> can this be done with every brand? or just the sonys?
> > >>
> > >> Pete
> > >> Perdomo Tv Inc Since 1972
> > >> Miami.Fl
> > >> ----- Original Message -----
> > >> From: <tjanphyl@xxxxxxxxxxxxxxx>
> > >> To: <techassist@xxxxxxxxxxxxx>
> > >> Sent: Sunday, September 04, 2005 12:11 PM
> > >> Subject: [TechAssist] Re: Panasonic CT-36G33W Chassis ALEDP313 in
> > >> SHUT DOWN
> > >>
> > >>
> > >> > Remove HOT collector. At the B+ INPUT to flyback, connect a 60
> > >> watt
> > >> > bulb (120V standard). Power up and see if it lights and
> stays
> on.
> > >> > Measure B+ at bulb to see what exactly the regulated B+ is. If
> > >> it's
> > >> > right on,the PS is OK,problem is probably a scan ckt
> issue.If
> the
> > >> B+
> > >> > output at bulb is too high, you now know it is excessive B+ and
> > >> the SD
> > >> > is simply doing what it should, and trouble shoot the PS ckt.
> > >> > Phil
> > >> >
> > >> > Phil Bader, Pres.
> > >> > Jan Phyl TV Inc
> > >> > Winter Haven, Fl
> > >> > (863) 299-8821
> > >> > estab. 1976
> > >> >
> > >> > ----- Original Message -----
> > >> > From: Shaun <satguy@xxxxxxxxxxxxx>
> > >> > Date: Saturday, September 3, 2005 7:02 pm
> > >> > Subject: [TechAssist] Panasonic CT-36G33W Chassis ALEDP313
> in
> > SHUT>> DOWN
> > >> >
> > >> >> This set will try to turn on then go into shut down. I
> replaced> >> >> the shorted
> > >> >> Horz output that was bad. I also replaced the flyback and no
> > >> help.
> > >> >> The high
> > >> >> voltage comes up then it shuts off and AC must be removed
> to
> get
> > >> >> it to try
> > >> >> again. Any notes on this set out there?
> > >> >>
> > >> >> Shaun
> > >> >>
> > >> >> Advanced Electronics
> > >> >> 224 West Riverview Ave.
> > >> >> Fort Morgan, CO 80701
> > >> >>
> > >> >>
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